Abstract: A system for generating electrical energy using a naturally occurring temperature difference is disclosed. The system provides electrical energy by thermally coupling a conduit that conveys hot material from a petroleum reserve and cold deep-level water to opposing sides of a thermoelectric element. The thermoelectric element generates electrical energy based on the temperature difference between these two surfaces.

Abstract: A system for generating electrical energy using a naturally occurring temperature difference is disclosed. The system provides electrical energy by thermally conduit a geothermal heat source and cold deep-level water to opposing sides of a thermoelectric element. The thermoelectric element generates electrical energy based on the temperature difference between these two surfaces.

Abstract: A technique is disclosed for preventing un-authorized attachment of computer peripherals to a computer or computer network. Illustrative embodiments comprise two mating keyed-adapters between network/host computer ports and peripheral ports. One or both adapters can contain hardware for enabling and disabling communications to and from peripherals under software control from a host computer. The peripheral-side adapter contains a first hardware for storing a unique identifier corresponding to the attached peripheral. The host computer retrieves this stored identifier and compares it to a database of authorized identifiers. If a match is found, then communication to and from the peripheral is enabled either in a second hardware within the adapter or software within the host computer. If a match is not found, then communication to and from the peripheral is not permitted.

Abstract: A method and apparatus for protecting against a buffer over flow attack. In one variation, an executable software program is divided into an executable image, a data image, and an execution history image. The operating system processes an executable statement in the executable image. Other statements are processed in the data image. In a second variation, the execution history image is made use of in addition to the tasks of the first variation. Each statement is classified as either mutable or immutable. The usage of statements is recorded in the execution history image. If a mutable statement has over-written an immutable statement memory location, then the program is terminated. Optionally, the entire program is re-mapped using the execution history image such that immutable statements cannot over-write mutable statements.

Abstract: A method is disclosed wherein engineered particles are used as obscurants and taggants for vehicles. In some embodiments, the engineered particles are nano-crystals or micro-spheres (doped or un-doped). In some embodiments, the particles are engineered to re-radiate the energy that they receive at either the same wavelength or a different wavelength than that of the incident photons. Particles that scatter light at the same wavelength as the interrogating beam are advantageously used as taggants. Particles that scatter light at a different wavelength as the interrogating beam are advantageously used as obscurants. In some embodiments, the method comprises storing a quantity of particles in a first vehicle, and releasing a portion of the particles in an ambient environment of the first vehicle.

Abstract: An intrusion detector and method of operation which include a light source having a certain correlation length, and first and second light paths, wherein at least the first path extends through a secured area. A modulator, which is advantageously either a phase rotation modulator or path length modulator, is provided in the second path. At least one optical detector is placed to detect light traveling along the two paths. A comparator is electrically coupled to the detector to compare the detected signal with a signal applied to the modulator.

Abstract: A laser and method of producing laser light. The laser and method involve passing a high energy beam of particles through an evacuated chamber. A static electric or magnetic field is established in the chamber in a direction that is essentially perpendicular to the direction of propagation of the beam, but which is a periodically varying field in the direction of propagation. The velocity of the particles and the variation in the field is sufficient to pump the particles into a higher energy state and produce laser light at the output of the chamber.

Abstract: A method is disclosed wherein engineered particles are used as obscurants and taggants for vehicles. In some embodiments, the engineered particles are nano-crystals or micro-spheres (doped or un-doped). In some embodiments, the particles are engineered to re-radiate the energy that they receive at either the same wavelength or a different wavelength than that of the incident photons. Particles that scatter light at the same wavelength as the interrogating beam are advantageously used as taggants. Particles that scatter light at a different wavelength as the interrogating beam are advantageously used as obscurants. In some embodiments, the method comprises storing a quantity of particles in a first vehicle, and releasing a portion of the particles in an ambient environment of the first vehicle.

Abstract: A laser and method of producing laser light. The laser and method involve passing a high energy beam of particles through an evacuated chamber. A static electric or magnetic field is established in the chamber in a direction that is essentially perpendicular to the direction of propagation of the beam, but which is a periodically varying field in the direction of propagation. The velocity of the particles and the variation in the field is sufficient to pump the particles into a higher energy state and produce laser light at the output of the chamber.

Abstract: An intrusion detector and method of operation which include a light source having a certain correlation length, and first and second light paths, wherein at least the first path extends through a secured area. A modulator, which is advantageously either a phase rotation modulator or path length modulator, is provided in the second path. At least one optical detector is placed to detect light traveling along the two paths. A comparator is electrically coupled to the detector to compare the detected signal with a signal applied to the modulator.